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Surf Forecasts:

Southside surfForecast / WA – Margaret River / Australia

information circle12 Day Weather and Surf, issued 7 pm Thursday 18 Sep 2025 AWST
Forecast update in hr  min  s Forecast update imminent
Southside surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Southside sea temperature is
17.6° C
 (Which is slightly warmer than usual)

Best Forecast Surf Conditions for Southside this week:

The surf forecast for Southside over the next 12 days: The first swell (rated 1 star or higher) is forecast to arrive on Friday (Sep 19) at 8PM. The primary swell is predicted to be 4.0m and 14s period. The wind is predicted to be cross-offshore as the swell arrives.

The most powerful waves expected at Southside in the next 12 days are 4.5m 14s and forecast to arrive on Friday (Sep 19) at 5AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.6m 4s period and expected on Sunday (Sep 21) at 8PM.

Wave TypeTime (AWST) & Date Wave Height & Period
Next good surf (1 star+) 8PM (Fri 19th Sep)13ft (4.0m) 14s
Best Surf 8PM (Fri 19th Sep)13ft (4.0m) 14s
Most Powerful 5AM (Fri 19th Sep)15ft (4.5m) 14s

Table - best surf conditions forecast for Southside over the next 12 days.

Updates in  hr  min  s Forecast update imminent 
12 DaysHourly
Print Table

Short Range Forecast Light rain (total 5mm), mostly falling on Thu night. Very mild (max 17°C on Sun morning, min 12°C on Sat night). Winds decreasing (fresh winds from the WSW on Thu night, light winds from the S by Sat morning).

Days 3-6 Weather Summary Mostly dry. Warm (max 23°C on Tue morning, min 14°C on Sun night). Wind will be generally light.

Friday
19
Saturday
20
Sunday
21
Monday
22
Tuesday
23
Wednesday
24
Thu
25
NightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPM
Rating
(10 max)
0
6
5
4
3
2
4
4
4
5
6
6
5
4
4
6
5
4
5
2
3
Swell
Height Map
See all maps
Wave Height (m) & direction (?)
4.5
SW
4.5
SW
4
SW
3.5
SW
3
SW
2.5
SW
2.4
SW
2.4
SW
2.5
SW
2.5
SW
2.3
WSW
3
WSW
3
SW
3
SW
3
WSW
3
WSW
3.5
WSW
3.5
WSW
3
WSW
3
WSW
2.5
WSW
Period(s) (?)141414141413131314141918171616161615151614
Wave
Graph
(?)Metric surfscale
Energy kJ (?)822478886448466232282390189219522703272436116113477041244204500653024829457540323071
Wind
(km/h)
30
SW
20
SSW
20
SSW
10
S
15
SW
15
SSW
10
SE
10
SSE
20
SSE
15
ESE
5
NNW
15
S
15
ENE
10
N
10
N
10
ENE
10
NNW
10
NNW
10
ENE
15
SSW
20
S
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
cross-
on		crosscrosscrosscross-
on		crosscross-
off		cross-
off		cross-
off		offglasscrosscross-
off		crosscrosscross-
off		crosscrossoffcross-
on		cross
High Tide
/ height (m)
8:28AM
0.66
11:16PM
0.38
9:04AM
0.62
10:21PM
0.41
9:38AM
0.57
10:06PM
0.46
10:09AM
0.50
10:03PM
0.52
10:36AM
0.43
10:04PM
0.57
10:48AM
0.36
10:10PM
0.62
9:52AM
0.30
Low Tide
/ height (m)
4:40PM
0.16
1:53AM
0.37
4:42PM
0.23
2:56AM
0.33
4:25PM
0.29
3:45AM
0.30
3:52PM
0.33
4:31AM
0.28
3:20PM
0.34
5:18AM
0.27
2:48PM
0.32
6:12AM 1:56PM
0.27 0.28
Friday
19
Saturday
20
Sunday
21
Monday
22
Tuesday
23
Wednesday
24
Thu
25
Sunrise-6:15--6:13--6:11--6:09--6:09--6:07--6:05-
Sunset--6:13--6:14--6:15--6:15--6:15--6:16--6:16
rain showers
rain showers
clear
part cloud
part cloud
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
part cloud
cloud
Rain (mm)
32-------------------
Temp. °C151616141515141717162020212323232323191818
Feels °C (?)81312121312121513131918192019202020181614
  • Map Icons:
  • Break
  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
Map placeholder

Eyeball surf reportRecent Eyeball Surf Reports for WA - Margaret River

  1. weather stationWind Update Wind reports 12 km away suggest it is still onshore at Southside (moderate winds from the W at Witchcliffe). A 4.0m groundswell from the SW is too big for here

    1 hour 34 minutes ago Southside
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1 h 34 min ago

20 km/h
W
Onshore
Please reload the page to see if there are any updates.

FREE! Surf-Forecast.com widget for your website

The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Southside surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.

View detailed surf forecast for Southside at:
surf-forecast.com

Information about the Southside Surf forecast

The above surf forecast table for Southside provides essential information for determining whether the surfing conditions will be good over the next 12 days. A general guide to surfing at Southside can be found by selecting the local surf guide option on the grey menu. Our Southside surf forecast is unique since it includes wave energy (power) that defines the real feel of the surf rather than just the height or the period. If you surf the same spot (Southside) regularly then make a mental note of the wave energy from the surf forecast table each time you go. Very soon you may start to choose your surf days based on the wave energy alone combined with our forecast of favourable offshore wind conditions. Our star ratings will help here and of course you will also find the usual wave height and period predictions on our surf forecasts as well as a full break down of the swell components under our advanced users option (to reveal that, click the little Einstein character under the tide times).

Further information to help with frequently asked questions about our surf forecast for Southside may be found under the help tab on the top menu and also by moving your mouse over the question marks on the surf forecast table itself. Please always bear in mind that the forecast is for near-shore open water and local factors at each surf break influence the actual breaking wave height, such as the beach / reef profile, water depths offshore and shelter.

Southside is 94 km (58 miles) from the city of Bunbury. If you plan a holiday in Margaret River, look for hotels and other accommodation in Bunbury. Bunbury has rooms for a wide range of budgets as well as car hire and transport links.

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